/*
  Web Server
 
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 
 */

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,2, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use 
// (port 80 is default for HTTP):
EthernetServer server(80);
String  readString = String(30);   // string for fetching data from address

void setup() {
 // Open serial communications and wait for port to open:
  Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}


void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) 
  {
    Serial.println("new client");
    // an http request ends with a blank line
  
    boolean currentLineIsBlank = true;
  
    while (client.connected()) 
    {
      if (client.available()) 
      {
        char c = client.read();


//******        char c = client.read();

        if (readString.length() < 30) 
        { //read char by char HTTP request
          readString.concat(c); 
        } //store characters to string
          
        //Serial.print(c); //output chars to serial port for debugging
        

//indexOf("L=")

        if (c == '\n') 
        { //if HTTP request has ended
        
          //Serial.println("");
          //Serial.println(readString); // print for debugging
          //Serial.println("");
          int Le = readString.indexOf("L="); //here is a key component of where 
          int He = readString.indexOf("H="); //the status is being read by the arduino
                   
          //lets check if LED should be lighted
          if (Le > 1)
          {
            Serial.print("L= position: ");
            Serial.println(Le);
          
            if (readString.substring(Le,(Le+3)) == "L=1") 
            { //led has to be turned ON
              //digitalWrite(ledPin, HIGH); // set the LED on
              Serial.println("ledpin paa");
              //LEDON = true; 
            }

            if (readString.substring(Le,(Le+3))== "L=0") 
            {
              //led has to be turned OFF
              //digitalWrite(ledPin, LOW); // set the LED OFF
              Serial.println("ledpin av");
              //LEDON = false; 
            }
          }
           
          if (He > 1)
          { 
            Serial.print("H= position: ");
            Serial.println(He);                        
   
            if (readString.substring(He,(He+3)) == "H=1") 
            { //heat has to be turned ON
                //digitalWrite(heatpin, HIGH); // set the heat on
                Serial.println("heatpin paa");
                //HEATON = true; 
            }
  
            if (readString.substring(He,(He+3)) == "H=0") 
            {
              //heat has to be turned OFF
              //digitalWrite(heatpin, LOW); // set the heat OFF
              Serial.println("heatpin av");
              //HEATON = false; 
            }
         }
         
         readString=""; //clearing string for next read
         
        }
//***************************           
        
        
        //Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) 
        {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println();
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
                    // add a meta refresh tag, so the browser pulls again every 5 seconds:
          //client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          // output the value of each analog input pin
          for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
            int sensorReading = analogRead(analogChannel);
            client.print("analog input ");
            client.print(analogChannel);
            client.print(" is ");
            client.print(sensorReading);
            client.println("<br />");      
           
  
  
  
     
          }
          
                   //controlling led via checkbox
  client.println("<h1>LED control</h1>");

  // address will look like http://192.168.xxx.xxx/?L=1 when submited
  // this line will give the radiobuttons that give the input
  client.println("<form method=get name=LED> <input type='radio' name='L' value='1'>LED ON<br><input type='radio' name='L' value='0'>LED OFF<br><input type='radio' name='H' value='1'>HEAT ON<br><input type='radio' name='H' value='0'>HEAT OFF<br><input type=submit value=submit></form>");

  client.println("<br />");
  //printing LED status
  client.print("<font size='52'>LED status: ");
  //client.println("<font color='green' size='52'>ON"); 
  client.println("<font color='red' size='52'>ON"); 
  
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        } 
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
        
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
}

